Lincoln Electric IM710 SP-170T - Manual (Page 34)

D-1
GUN AND CABLE
MAINTENANCE
FOR MAGNUM™ 100L GUN
Gun Cable Cleaning
Clean cable liner after using approximately 300 lbs
(136 kg) of solid wire or 50 lbs (23 kg) of flux-cored
wire. Remove the cable from the wire feeder and lay it
out straight on the floor. Remove the contact tip from
the gun. Using low pressure air, gently blow out the
cable liner from the gas diffuser end.
Excessive pressure at the start may cause the dirt
to form a plug.
Flex the cable over its entire length and again blow
out the cable. Repeat this procedure until no further
dirt comes out.
Contact Tips, Nozzles, and Gun Tubes
• Dirt can accumulate in the contact tip hole and
restrict wire feeding. After each spool of wire is
used, remove the contact tip and clean it by push-
ing a short piece of wire through the tip repeatedly.
Use the wire as a reamer to remove dirt that may
be adhering to the wall of the hole through the tip.
• Replace worn contact tips as required. A variable
or “hunting” arc is a typical symptom of a worn con-
tact tip. To install a new tip, choose the correct size
contact tip for the electrode being used (wire size is
stenciled on the side of the contact tip) and screw it
snugly into the gas diffuser.
• Remove spatter from inside of gas nozzle and from
tip after each 10 minutes of arc time or as required.
• Be sure the gas nozzle is fully screwed onto the
diffuser for gas shielded processes. For the
Innershield
® process, the gasless nozzle should be
screwed onto the diffuser.
CAUTION
D-1 MAINTENANCE
SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
• Disconnect input power by
removing plug from receptacle
before working inside SP-170T.
Use only grounded receptacle. Do
not touch electrically “hot” parts
inside SP-170T.
• Have qualified personnel do the
maintenance and trouble shoot-
ing work.
ROUTINE MAINTENANCE
POWER SOURCE COMPARTMENT
In extremely dusty locations, dirt may clog the air pas-
sages causing the welder to run hot. Blow dirt out of
the welder with low pressure air at regular intervals to
eliminate excessive dirt and dust build-up on internal
parts.
WIRE FEED COMPARTMENT
• When necessary, vacuum accumulated dirt from
gearbox and wire feed section.
• Occasionally inspect the incoming guide tube and
clean inside diameter if necessary.
• Motor and gearbox have lifetime lubrication and
require no maintenance.
FAN MOTOR
Has lifetime lubrication — requires no maintenance.
WIRE REEL SPINDLE
Requires no maintenance. Do not lubricate shaft.
WARNING
SP-170T